Improved rotary excavator



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To WHOM I TMAY coNoERN- B- it known that I, JAMES D-VEBUX', of Marshall, in the county of Calhoun, and State of Michigan, have I invented certain new and'useful Improvements in RotaryEzrcavators; and that the following is a true and accurate description thereof, reference benghad to the' accompanying drawings, and to the letters of reference marked thereon, and making part of this specification, in which- Y' Figure 1 isa. perspective view,'vrith the excavator-buckets shown in outline, as when raised for dumping. Figure 2 is a vertical sectional view of the lowerend of' the vertical rotating shaft with its attachments. Similar letters indicate thefsamfe parts .in each figure; Y The nature of this invention consists in constructing an apparatus for the' sinking of wellsand shafts linto 'the earth, and raising the earth excavated by the same Vto thesurface, and there dumping it with ease and rapidity.

To enable others skilled in same, and name its various parts.

A are standards, supporting the table B, and the lower ends of which rest upon and are firmly secured to the ground. Dis a vertical shaft, with a metallic point, 0, provided with a proper worm for entering the earth andsguiding the apparatus in its descent, its upper part passing through `and rotating in a proper opening in the table B, and so arranged that when the excavator has progressed until has passed dorvi'n,l nearly through the table, another shaft may be coupledon and the work continued. 7 is a. disk, rotating with' the shaft C,'andl resting upon proper shoulders in the standards A. Under this disk, and secured to the same, are the sheave bloeks E and F. Gr'are, horizontal arms, rigidly secured to the vertical `shaft D, near its point, and carrying v the guide-wheels H, whichare adjustable laterallyat I, and vertically at J, for the'purpose of regulating the cut, of the excavators Ml The lower section of the' vertical shaft D, being square, sliding freely thereonis the metallic frame K,

provided with the'stirrups L for supporting the excavator-buckets M, which are centrally hinged-to the same at N, the excavator-buck'ets'M being secured to their proper relative positions to the frame K by means of the,

buttons O arid pins P. i Q ,are'hearing-wheels, keepingthe steel edges R of the excavator-buckets M in position to enter the earth.4 S are dogs, on the horizontal'armsJ, engaging with and securing the frame to its proper position,'resting upon the said hori'xonta'l'arms J. VThe ,dogs areA actuated by the spiral Asprings T, andare disengaged from the frame K by means of thecords. U passing under the pulleys V, and passing up are secured to the ring-bolts in.the under side ofthe disk 7. W are chains, Vsecured ,to the sides of the excavator-buckets M,

andsradiating from common central rings, and, by means of theropes X, secured to these rings, passing through the sheave-blocks E and F to the capstan Y, the'dgs being disengaged from 'the frame K, the excavators are raised to the surface bythe ropes X and capstan Y, where they are tipped up and their contents dumped, asy shown in red outline, g. 1; Z is a sweep, attachedto the vertical shaft D, to which a horse is attached, `rotating the excavator-buckets Mfcausing them to bore into and ll with earth.

What I claim as my invention, and desire to secure by `Lett-ers Patent, is p An excavator, composed of the standards A, tableB,'disk 7, sheave-blocks E and I?, sweep Z, frame K, buttons O, pins l?, stirrups L, hinges N, excavator-buckets M, bearing-.wheels Q, chains W, ropes X, t'hevertical rotating shaft D, metallic 4point C, horizontal arms G, adjustable guide-Wheels' H, dogs S, springs T, pulleysv V, cord U, and capstan Y, when arranged and operating substantially as described, and for the pur# poses specified. i

i JAMES DEVERAUX.

Witnesses i EDWARD SHARPSTUN, E. HAMBLIN.

the art to construct and use my invention, I will now proceed to describe the 

